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77julia77 [94]
2 years ago
13

Solve the simultaneous equations. xy = 4x + y = 5​

Mathematics
2 answers:
lozanna [386]2 years ago
6 0

Answer:

1,4

4,1

Step-by-step explanation:

y = 4/x

substitute

x + 4/x = 5

multiply the whole thing by x to make life easier

x^2 +4 = 5x

X^2 -5x +4 = 0

(x-1)(x-4)=0

x-1=0 x =1

x-4 =0. x=4

so there are 2 solutions

x=1. y = 4

x =4. y =1

Maru [420]2 years ago
5 0
Answer:
if X=1 ; Y=4
if X=4 ; Y=1
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60 starbursts

Step-by-step explanation:

We can set up an equation to find the answer. 21/x=0.35/1 because we're trying to find how many starbursts make up 100% of the package. So then to solve, we take 21x1 and then divide that by 0.35. From this we find that x=60.

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How far is 0, 7 from the origin
Delvig [45]

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Step-by-step explanation:

Count the numbers in between (0,0) and (0,7).

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Factorize 81xsquared+180x+100
bekas [8.4K]

Answer:

  • 81x²+180x+100
  • 9x²+180x+10²
  • using (a+b)²=a²+b²+2ab
  • 9x²+2(9x)(10)+10²
  • (9x+2)²=(9x+2)(9x+2)
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I had $10 my mom gives me $30 my dad gave me $30 my aunt and uncle give 100 dollars I had $10 how much did I have ​
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Divide. HELP ASAP PLEASE!!
VashaNatasha [74]

Answer:

The answer to your question is below

Step-by-step explanation:

a)                             \frac{s^{2}- 3s - 28 }{s - 7}

Factor the numerator is a polynomial of the form    x² + bx + c

                                              s² - 3s - 28 = (s - 7)( s + 4)

Substitute

                               \frac{(s - 7)(s + 4)}{(s - 7)}

Simplify like terms

Result                                               s + 4

b)                          \frac{c^{2} + 5c - 24}{c + 8}

Factor the numerator is a polynomial of the form x² + bx + c

                                           c² + 5c - 24 = (c + 8)(c - 3)

Substitute

                                          \frac{(c + 8)(c - 3)}{c + 8}

Simplify like terms                            c - 3

Result                                                c - 3

                                         

3 0
3 years ago
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